Burner for liquid fuel



Oct. 5, 1937. L. J. GIANOLA BURNER FOR LIQUID FUEL Filed May 29, 1955 \N Q. o Nu KN aw b\ em o ON Wm. M MM pm w AW v i Patented Oct. 5, 1937 PATENT OFFICE BURNER FOR. LIQUID FUEL Louis Jean Gianola, Thonon-les-Bains, France Application May 29, 1935, Serial No. 24,135

In France July 25, 1934 3 Claims.

This invention relates to a burner for liquid fuel, comprising a tube for supplying fuel under pressure and terminating in a spraying nozzle, an

air pipe concentric with said spraying nozzle and in which air for ensuring the combustion is delivered, pivoted blades, capable of being set, be ing arranged in said air pipe so as to guide the air streams and to give them any desired direction.

prises a tube for supplying fuel under pressure. a spraying nozzle arranged at the end of said tube, a tube for supplying airvconcentric with said spraying nozzle, a socket loosely mounted on said fuel supply tube, radial rods rigid with the air pipe and said socket, blades pivoted on said rods, a nozzle-holder mounted at the end of said fuel supply tube and having grooves parallel to the axis of the tube, projections proyided on the blades and extending into said grooves so that a partial. turning or rotation of said air pipe about its longitudinal axis, moves the radial rods about which the blades are pivoted and causes the blades to pivot and to be set.

The invention further relates to a number of particular features which will appear from the following description with reference to the accompanying drawing, given by way of example only, in which:

Fig. 1 is a longitudinal section of the burner proper.

Fig. 2 is an end view of the device shown in Fig. 1 and showing the nose of the burner.

Fig. 3 is a sectional view, on an enlarged scale, of the nozzle-holder and of its associated parts, showing in particular the grooves for setting the blades of the air deflector.

The invention more particularly relates to burners of the so-called mechanical atomizing type, comprising a fan, adapted to ,blow in the desired quantity of the air for combustion, at least one pump adapted to send the liquid fuel under pressure to the atomizing nozzle, and a number of control members. These burners being of a well-known type, they will not be described in greater detail. The following description relates only to improvements according to the invention.

5 The burner proper comprises a cylindrical tube or conduit l which is fitted at the end of the delivery connecting branch 3 of the fan or the like (not shown) and the casing of which is partly illustrated, so as to be capable of rotation relatively to this casing 3. Abutments (not shown) In one form of construction, the burner comcan be provided for limiting the rotation of the cylindrical tube l.

In a form of construction, which appears to b most advantageous, the cylindrical tube I is provided, at its end, with an outwardly bent ledge 4 which fits into a circular space provided between a flange 5, integral with the connecting branch 3 of the fan, and a removable flange-2 secured on the flange 5 by any suitable means, such as clamping bolts 1 and nuts 1'. The bolts are passed through the flanges 2 and 5 beyond the ledge land by tightening the nuts, the tube I can be held stationary in any desired position.

A tube 8 is arranged substantially coaxially block 9 movable in a suitable recess II) in which it is suitably guided so as to have only a movement of translation. The slide-block 9 will have or the like, screwed on a screw-threaded portion I4 of the tube 8. By means of this arrangement,

it will be easily seen that the manipulation of the nut I3 causes the tube 8 to receive a movement of translation. This tube 8 can be locked in position by any suitable means, and, for instance, as shown in Fig. 1 of the drawing, by a set screw l5 fitted on the head H and the end of which comes in contact with the slide-block 9 for looking the latter in position.

The other end of the tube 8 is screw-threadedfor receiving a nozzle-holder IS in which is screwed the spraying nozzle proper ll which can be of any suitable type. The nozzle-holder l6, which is of tubular shape, is provided on its periphery with a number of grooves I8 (Figs. 2

p allel to the axis of the spraying nozzle I] A ring!!! is loosely mounted on the nozzle-holder lfi" and-is. connected to the tube l by rods 20onwhich'blades Z Iare pivoted. Each of the blades 2| carries a projection ZZeXtending ularly spaced apart and arranged for into one of the grooves I8 of the nozzle-holder I6,

'so that rotation of the ring I9 relatively to the nozzle-holder I6 causes the blades 2I to rotate in one direction or the other according to the direction of rotation of the tube I. and, consequently, of the ring I9 which is integral therewith. It will therefore be seen that, in this mannet, the air coining from the fan and passing through the tube I, receives, when it issues, a. helical movement the pitch of which corresponds to the inclination of the blades 2|. The pitch of this helical movement of the air can be modifled by varying the inclination of the blades 2|, this being obtained by causing the tube I to rotate as indicatedabove, and it will be seen that this adjustment can be very easily effected, even when the burner is in operation.

One or more ignition electrodes 23 are mount- I ed on the tube 8 by means of electrode-carriers 24 made of insulating material and-for instance of porcelain. The current is supplied to the electrodes 23 by suitably insulated wires 25, or the like, which are connected to the secondary winding of the ignition transformer (not shown) and pass through the head I I serving as a support for the tube 8.

On the tube I and at the end of the latter adjacent to the spraying nozzle is fitted with slight which are screwed in the tube I and extend through longitudinal slots 28 provided in the mouth piece 26. These screws 21 further allow of holding the mouth piece 26 stationary in any desired position along the tube I. The mouth piece 26 is provided, at its end, with a part 29 inclined towards the centerand forming a salient angle adapted to create, at the mouth piece outlet, an eddying movement of the air. This turbulence causes a certain blowing of the flame at the outlet of the spraying nozzle and, in this manner, the flame burns at some distance from the spraying nozzle and from the points of the electrodes 23. By the displacement of the mouth piece 26, it will be possible to control the turbulence of the air so that the flame burns at a suitable distance from the spraying nozzle (5 to 6 centimeters for instance) and, once the adjustment is effected, the mouth piece 26 will be locked in position by means of the screws 21.

It has been indicated above how the tube 8 and its associated parts, viz: the spraying nozzle II, nozzle-carrier I6, and electrodes 23'can be adjusted and held stationary in the axial direction by means of the milled nut I3 and locking screw l5.

Within the tube I and adjacent to its end is secured a guide incline 30 which serves for guiding the end of the tube and its associated members upon resetting the whole in position. In fact, it will be seen that by detaching the head II from the delivery connecting branch 3 of the fan, it is possible to remove, with this head II, the entire unit fitted on the same, that is to say the tube 8, electrodes 23, electrode-carriers 24, spraying nozzle I1 and nozzle-carrier l6, so that after'this unit has been removed, there remains only the blades 2|, rods 28 and the associated ring I9. Upon resetting in position, the unit is guided by incline 30, and the nozzle-carrier I6 accurately fits into the ring III. In this way, it

' will be seen that the removal and resetting in position are facilitated and that they are effected without risk of damaging the various members and, in paricular, the points of the electrodes 23. What I claim as my invention and desire to secure by Letters Patent is: t

1. In a burner for liquid fuel in combination a tube for supplying air and mounted so as to be partially rotatably adjustable about its longi-' tudinal axis, a tube for supplying fuel under pressure arranged coaxially within said air supply tube, means for preventing any rotation of said fuel supply tube, a nozzle-holder mounted at the end of said fuel supply tube and having grooves parallel to the axis of this tube, a spraying nozzle mounted on said nozzle-holder, a ring loosely mounted on said nozzle-holder, radial rods projecting from the ring and fixed to the air tube, blades pivoted on said rods and having projections engaged in said grooves so that a partial rotation of said air supplytube causes the said rods to be moved as a whole with said air supply tube and said ring, whereby the said blades are pivoted and set.

2. In a burner for liquid fuel in combination a tube for supplying air, a tube for supplying fuel under pressure arranged coaxially within said air supply-tube, a slide-block in the shape of a parallelepipedon secured on the said fuel supplying tube, a fixed head for supporting said fuel supplying tube, said head being provided with a recess in which said slide-block can axially slide to prevent rotation of said tube and allow axial movement thereof, a nozzle-holder mounted at the end of said fuel supplying tube and having grooves parallel to the axis of this tube, a spraying nozzle mounted on said nozzle-holder, a ring loosely mounted on said nozzle-holder, radial rods projecting from the ring and fixed on said air tube, blades pivoted on said rods and having projections engaged in said grooves so that a partial rotation of said air supply tube causes the'said rods to be moved as a whole with said air supply tube and said ring, whereby the said blades are pivoted and set.

3. In a burner for liquid fuel in combination nozzle-holder, a ring loosely mountedon said nozzle-holder, radial rods projecting from the ring and fixed to said air tubes, blades pivoted on'said rods and having projections engaged in said grooves so that a partial rotation of said air supply tube causes the said rods to be moved as a whole with said air supply tube and said ring, whereby the said blades are pivoted and set, a mouth piece slidably mounted on said air supply tube at the end of the latter. adjacent to said spraying nozzle, the extreme edge of said mouth piece being of conical shape and inclined towards the axis in order to create, at the mouth piece I outlet, an eddying movement .of the air.

LOUIS JEAN GIANOLA. 

